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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 520 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  7. 7.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  13. 13.An angle measures 145°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  14. 14.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  17. 17.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.An angle measures 60°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  22. 22.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  23. 23.An angle measures 130°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  24. 24.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  38. 38.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  39. 39.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?

Answer key

  1. 85
  2. 65
  3. 120
  4. 140
  5. 130
  6. Straight
  7. 55
  8. 110
  9. 155
  10. 130
  11. 70
  12. 55
  13. Obtuse
  14. 180
  15. 170
  16. 95
  17. Acute
  18. 60
  19. 85
  20. 80
  21. Acute
  22. Acute
  23. Obtuse
  24. 170
  25. 5
  26. 150
  27. 130
  28. 15
  29. 60
  30. 130
  31. 140
  32. 60
  33. Right
  34. 115
  35. 35
  36. 135
  37. 60
  38. Acute
  39. Obtuse
  40. 15

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